﻿#region License, Terms and Conditions
//
// Copyright (c) 2008, aspZone.com
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the <organization> nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY aspZone.com ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author(s):
//  John Rudolf Lewis (http://aspZone.com)
//
#endregion

namespace AspZone.Commerce.Repositories
{
    using System.Linq;
    using AspZone.Commerce.Model;
using System.Collections.Generic;

    public static class CategoryQueries
    {
        public static Category WhereIdEquals(this IQueryable<Category> query, int id)
        {
            var category = query.SingleOrDefault(c => c.Id == id);
            if (category == null)
            {
                throw new EntityNotFoundException();
            }
            return category;
        }

        public static Category WhereSEONameEquals(this IQueryable<Category> query, string seoName)
        {
            var category = query.SingleOrDefault(c => c.SEOName == seoName);
            if (category == null)
            {
                throw new EntityNotFoundException();
            }
            return category;
        }

        public static IQueryable<Category> WhereParentCategoryIdEquals(this IQueryable<Category> query, int parentCategoryId)
        {
            var result = query.Where(c => c.ParentCategoryId == parentCategoryId);
            return result;
        }

        public static IList<Category> ToHierarchicalList(this IQueryable<Category> query)
        {
            var categories = query.ToList();
            foreach (var category in categories)
            {
                if (category.ParentCategoryId != null)
                {
                    category.ParentCategory = categories.SingleOrDefault(c => c.Id == category.ParentCategoryId);
                }
                category.ChildCategories = categories.Where(c => c.ParentCategoryId == category.Id).ToList();
            }
            var result = categories.Where(c => c.ParentCategoryId == null).ToList();
            return result;
        }
    }
}
